Rupert, or as he likes to call himself The Bear, was Tilly's fiance. Tilly's pet name for him was "Pupert" or "Poopert"
This episode is where Rupert is introduced to Miranda and her friends. It's realized that Rupert was coming on to Miranda. Miranda was able to reveal this to Tilly when Rupert appeared almost naked to Miranda in her apartment, and said to Miranda "I MUST have you!". Tilly, Stevie and Miranda all told him to "Get out!!"